how to trade eurusd and usdchf in one expertadvisor ?

[Forex Trader]

i attached this expertadvisor on "EURUSD",why cann't trade "EURCHF" ?

how to use one expert to trade two or three currency???


//+------------------------------------------------------------------+
double v;
int j,ticket;

int start()
{
v=iForce(Symbol(),0,12,MODE_SMA,PRICE_CLOSE,0);

if (OrdersTotal()<1)
{
if (v>0.0003)
{OrderSend("USDCHF",OP_BUY,1,Ask,0,0,Ask+10*Point,"test",0,16384,Gold);}
{OrderSend("EURUSD",OP_BUY,1,Ask,0,0,Ask+10*Point,"test",0,16384,Gold);}
//+------------------------------------------------------------------+

[Forex Trader]

Instead of Ask use MarketInfo("USDCHF",MODE_ASK), MarketInfo("EURUSD",MODE_ASK)

[Forex Trader]

thanks,slawa

[Forex Trader]

but i have to attach the expert on EURUSD and USDCHF chart dividely.

can i trade USDCHF by the expert attached the EURUSD chart?

i mean that i close an order of USDCHF and at the same time open an order of EURCHF by one expert only on EURUSD chart(the expert not attached on USDCHF chart).

i am from China, english is not good.

do i explain clearly?